Healthcheck does not represent real state of feeder

[LsHallo]

My container reports healthy but opensky dashboard shows I'm not feeding:

This setup has worked before and stops working every time my beasthost is not reachable for ~2s which occurs regularly due to spotty WiFi. It would be nice if the healthcheck would detect that so the container can restart accordingly.

I also recognize that this might be out of the reach of this repo and might be a problem with the opensky feeder since it reports that it is still online so you couldn't detect the issue:

[2023/04/25 22:03:46][opensky-feeder] Statistics
[2023/04/25 22:03:46][opensky-feeder]  - started on Sat Apr 15 22:43:46 2023
[2023/04/25 22:03:46][opensky-feeder]  - running since   9d, 23h:20m:00s
[2023/04/25 22:03:46][opensky-feeder] 
[2023/04/25 22:03:46][opensky-feeder]  Receiver
[2023/04/25 22:03:46][opensky-feeder]  -                     1629163 frames received (1.89 /s, 0.00 /s)
[2023/04/25 22:03:46][opensky-feeder]  -                          45 [  0%] Mode-A/C (0.00 /s, 0.00 /s)
[2023/04/25 22:03:46][opensky-feeder]  -                     1062841 [ 65%] Mode-S Short (1.23 /s, 0.00 /s)
[2023/04/25 22:03:46][opensky-feeder]  -                      566277 [ 35%] Mode-S Long (0.66 /s, 0.00 /s)
[2023/04/25 22:03:46][opensky-feeder]    -                       92262 [  6%] type 0 (0.11 /s, 0.00 /s)
[2023/04/25 22:03:46][opensky-feeder]    -                      166453 [ 10%] type 4 (0.19 /s, 0.00 /s)
[2023/04/25 22:03:46][opensky-feeder]    -                       32540 [  2%] type 5 (0.04 /s, 0.00 /s)
[2023/04/25 22:03:46][opensky-feeder]    -                      771586 [ 47%] type 11 (0.90 /s, 0.00 /s)
[2023/04/25 22:03:46][opensky-feeder]    -                        7905 [  0%] type 16 (0.01 /s, 0.00 /s)
[2023/04/25 22:03:46][opensky-feeder]    -                      215133 [ 13%] type 17 (0.25 /s, 0.00 /s)
[2023/04/25 22:03:46][opensky-feeder]    -                      283147 [ 17%] type 20 (0.33 /s, 0.00 /s)
[2023/04/25 22:03:46][opensky-feeder]    -                       60092 [  4%] type 21 (0.07 /s, 0.00 /s)
[2023/04/25 22:03:46][opensky-feeder]  -                           0 [  0%] status (0.00 /s, 0.00 /s)
[2023/04/25 22:03:46][opensky-feeder]  -                           0 [  0%] unknown (0.00 /s, 0.00 /s)
[2023/04/25 22:03:46][opensky-feeder]  -                     1414030 [ 87%] filtered (1.64 /s, 0.00 /s)
[2023/04/25 22:03:46][opensky-feeder]  -                     1413985 [ 87%] Mode-S filtered (1.64 /s, 0.00 /s)
[2023/04/25 22:03:46][opensky-feeder]  -                     1629163 unsynchronized frames
[2023/04/25 22:03:46][opensky-feeder] 
[2023/04/25 22:03:46][opensky-feeder]  Buffer
[2023/04/25 22:03:46][opensky-feeder]  -                           0 queued messages (current)
[2023/04/25 22:03:46][opensky-feeder]  -                          23 queued messages (max)
[2023/04/25 22:03:46][opensky-feeder]  -                           0 discarded messages (current)
[2023/04/25 22:03:46][opensky-feeder]  -                           0 discarded messages (overall)
[2023/04/25 22:03:46][opensky-feeder]  -                           0 discarded messages (in worst overflow situation)
[2023/04/25 22:03:46][opensky-feeder]  -                         199 messages in pool (Usage 0.00%)
[2023/04/25 22:03:46][opensky-feeder]  -                           0 dynamic pools (current)
[2023/04/25 22:03:46][opensky-feeder]  -                           0 dynamic pools (overall)
[2023/04/25 22:03:46][opensky-feeder]  -                           0 dynamic pools (max)
[2023/04/25 22:03:46][opensky-feeder]  -                           3 flushes
[2023/04/25 22:03:46][opensky-feeder]  -                           0 uncollected dynamic pools
[2023/04/25 22:03:46][opensky-feeder]  -                           0 Garbage Collector runs
[2023/04/25 22:03:46][opensky-feeder] 
[2023/04/25 22:03:46][opensky-feeder]  Network
[2023/04/25 22:03:46][opensky-feeder]  -                             currently online
[2023/04/25 22:03:46][opensky-feeder]  -                      861600 [100%] seconds online (overall)
[2023/04/25 22:03:46][opensky-feeder]  -                           2 disconnections
[2023/04/25 22:03:46][opensky-feeder]  -                           3 connection attempts
[2023/04/25 22:03:46][opensky-feeder]  -                     6067253 bytes sent (7.04/s)
[2023/04/25 22:03:46][opensky-feeder]  -                          18 bytes received (0.00/s)